Pocket knife



FIG. 1 is a front perspective view of a pocket knife, showing my new design;

FIG. 2 is a right side elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a rear elevation view thereof

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines shown in FIGS. 1-7 depict portions of the pocket knife in which the design is embodied that form no part of the claimed design. 

CLAIM The ornamental design for a pocket knife, as shown and described. 